Import data sources can be changed to the wrong list by renaming lists.
If a model contains a list import from another model, renaming a list from the target model can cause the import to be remapped.
In a model, each list has a unique ID number. However these are only unique to the model so lists in different models can share the same ID number.
When a list is renamed, if the model contains an import from a list from a different model that has the same ID number, the import data source may get remapped to the list from the wrong model.
If this does occur, you can simply remap the import back to the correct data source. You may notice this issue if any of your imports fail or import incorrect data. It may also be sensible to check your import sources after renaming any list items in the model.